scaffold

weed/mq/README.md

@@ -25,6 +25,10 @@ SeaweedMQ is designed for use cases that need to:
 * Pass messages by reference instead of copying.
   * Clients can optionally upload the messages first and just submit the references.
   * Drastically reduce the broker load.
+* Stateless brokers
+  * All brokers are equal. One broker is dynamically picked as the leader.
+  * Add brokers at any time.
+  * Allow rolling restart brokers or remove brokers at a pace.
 
 # Design
 

weed/mq/broker/brokder_grpc_pub.go

@@ -0,0 +1,16 @@
+package broker
+
+import (
+	"github.com/seaweedfs/seaweedfs/weed/pb/mq_pb"
+)
+
+/*
+The messages is buffered in memory, and saved to filer under
+	/topics/<topic>/<date>/<hour>/<segment>/*.msg
+	/topics/<topic>/<date>/<hour>/segment
+	/topics/<topic>/info/segment_<id>.meta
+*/
+
+func (broker *MessageQueueBroker) Publish(stream mq_pb.SeaweedMessaging_PublishServer) error {
+	return nil
+}